Hial s



(No Model.)

H. S. GRANNIS.

GROOVING MACHINE.

No. 462,840. Patented Nov. 10,1891.

UNlTED STATES PATENT- OFFICE.

HIAL S. GRANNIS, OF SOUTHINGTON, CONNECTICUT, ASSIGNOR TO THE PECK, STOlV & VVILCOX COMPANY, OF SAME PLACE.

GROOVlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 462,840, dated November 10, 1891.

Application filed February 18, 1891- Serial No, 381,815. (No model.)

T all whom. it may concern: nary manner of driving such rack-bar in Be it known that 1, HIAL S. GRANNIS, a citianalogous machines-ms, for instance, a rack zen of the United States, residing at Southand pinion. The lower horn is provided on ington, in the county of Hartford and State of one side, as atll, with a flat place, extending 5 5 Connecticut, have invented certain new and longitudinally, and upon three other sides at useful Improvements in Grooving-Machines, equal distances therefrom with longitudinal of which the following is a specification. grooves 15, the width of which should corre- My invention relates to improvements in spond to the respective width of the grooves grooving-machines, and the objects of my imin the grooving-rollers of an ordinary set. At IQ provement are cheapness and simplicity of the inner end of the lower horn I drill four construction and the production of a strong locking-holes 16,Fig. 2, and within the frame and substantial machine for long work and of the machine I arrange a locking-bolt 17 which is especially easy and convenient to and a spring 18, which presses upon said bolt operate. with a constant tendency to force it inwardly. r 3 In the accompanying drawings, Figure 1 is These locking-holes 16 are in alignment with a side elevation, partly in section, of my mathe respective grooves and fiat place on the chine as mounted upon a standard. Fig. 2 is lower horn. lVhen this horn is put in place,

a vertical section of said machine on line a cc (the set-screws 6 being loosened and the lockof Fig. 1; and Fig. 3 is a vertical section of ingb0lt pulled out,) the horn is turned around 20 the horns or bars on line 3 y of Fig. 1, with to bring the flat place or desired groove upthe other parts in side elevation. permost, and when it reaches the top the look- A designates the frame, having the usual ing'bolt 17 will snap into one of the holes 16 longitudinal opening for.the passage of the and lock the lower horn in proper'position. rack-bar B and having two sockets 4 and 5, The set-screws 6 are then tightened to firmly 25 which are round in cross-section, as shown in hold the horn in place.

Fig.2. These sockets are each provided upon In the ordinary grooving-machine a fiat one side with set-screws 6, whose inner ends cast-metal bar is used at the point where I are capable of reaching through the walls of place the upper horn 7. The carriage and the sockets. The lower part of the frame is rack-bar are mainly guided by said upper bar,

0 provided with the usual standard-socket C by and consequently the ordinary carriage is prowhich to secure the machine to a suitable vided not only with side pieces extending up standard I), as shown in Fig. 1. by the side of the bars, but with upwardly- Instead of a flat bar and a horn, as in ordiprojecting lugs in the rear of said side pieces nary groovinganachines, I form two horns '7 for engaging the sides of the bar at its lower 8 5 3 5 andSof cold-rolled steel and insert said horns edge. This bar,being of cast metal, is liable within the sockets 4i and 5, where they are setowarp,and itisnotonlydifiicult to straighten, cured by the set-screws 6. These horns and. but when straightened as well as is practicathe rack-bar may be of any desired length. At ble it is difficult to make the roller track well the outer end of the upper horn 7 1 pivot a on the horn. 9o

40 swinging bail 9, the lower end of which hasa in my machine I leave a little room hesocket that slips over a tenon 19 on the end tween the side pieces of the carriage and the of the lower horn 8, so as to hold the horns surrounded upper horn, so that the carriage parallel to each other. At the end of the rack may work up and down thereon, and I make bar is a carriage 10 for the roller 11, the side the case A much wider at the part where the 5 45 pieces of which at the upper portion of said rack-bar passes through it, so as to cause the carriage are swelled or curved for extending rack-bar and its carriage to be guided largely around the upper horn,as shown. The rackby the case and that end of the bar that bar and carriage are also provided with the passes through said case. ordinary spring-roller frame 12 and its roller. The flat place upon the lower horn is for so The rack-bar and carriage are driven by the use when it is designed to leave the seam upon crank 13 and connected devices in any ordithe outside, and the grooves are designed for use in connection with their respective rollers when it is desired to leave the seam upon the 7 turn the horn to bring the desired portion to the top, when upon releasing the locking-bolt itwill lock itself in the hole that is brought opposite thereto, and the set-screws may be again tightened to rigidly hold the horn in place. The swinging hail 9 permits the work to be slipped on and'oft over the lower horn and to hold the horns firmly together after the Work is slipped on.

I am aware that a prior patent shows a grooving-machine with a round lower horn set in a socket in a frame and having peculiar longitudinal grooves formed in said bar; also, that another patent shows a grooving-machine I with a swinging bail for connecting the horn and upper bar at their outer ends. All of said prior art is hereby disclaimed.

By my invention the frame is easily and cheaply cast, is of a small and com-pact form, and both horns may be made from a round bar of cold-rolled steel and cheaply and quickly inserted within the sockets of the frame. By making them of steel instead of cast-iron I make a very strong and durable machine, particularly in both the upper and lower horns, and I can extend the length indefinitely. By being made of bar-steel the upper horn is easily made straight andtrue guiding the rack largelyby means of the case the roller in my machine will track better and the machine in general is more efficient than the ordinary grooving-machine.

I claim as my invention 1. The combination of the frame A, having upper and lower sockets, set-screws 6, and a longitudinal passage for arack-bar, the upper and lower horns 7 and 8, formed of round bars and secured within said sockets, the rack-bar B, fitted to the longitudinal passage through said frame, and the roller-carriage 10,having curved side pieces surrounding and embracing said round upper horn, substantially as described, and for the purpose specified.

2. In a grooving-machine having an upper horn, the combination of the frame having a socket for a lower horn, the lower horn 8, fitted to said socket and provided at its socket end with locking-holes 16, and a locking-bolt secured in said frame for engaging said holes for locking said lower horn correctly in its several positions, substantially as described, and for the purpose specified.

HIAL S. GRANN IS.

Witnesses:

STEPHEN WALK EY, E. M. STANNARD. 

